Method for detecting contacts, and touch panel using same

Abstract

The invention relates to a method for detecting contacts, and a touch panel using the same. The method is suitable for detecting a plurality of contacts and comprises the following steps of: providing a resistance type pressure sensing matrix, wherein the resistance type matrix comprises M X-axis induction lines and N Y-axis induction lines, and when a preset range of the junction between the ith X-axis induction line and the jth Y-axis induction line receives a pressure, the ith X-axis induction line and the jth Y-axis induction line are short-circuited; supplying a scanning voltage to the pth Y-axis induction line in a pth scanning period; detecting the M X-axis induction lines to judge whether any scanning voltage is detected; and determining the touched coordinate to be (q, p) when the qth X-axis induction line receives the scanning voltage in the pth scanning period, wherein M, N, i, p and q are positive integers, i is more than 0, q is less than or equal to M, and p is more than 0 and less than or equal to N.

Description

technical field [0001] The present invention relates to a touch panel technology, and in particular to a touch point detection method and a touch panel using the touch point detection method. Background technique [0002] In recent years, due to the popularization of electronic products, the application of touch panels has become more and more extensive. For example, mobile phones, personal digital assistants, and notebook computers have all used touch panels as input interfaces. Even touch panels are widely used in general home appliances, such as refrigerators, washing machines, and the like. Therefore, it can be seen that the touch panel technology has a rapidly growing application market. [0003] Among the touch panel technologies, the resistive touch panel is currently the most widely used technology. figure 1 A side view of a conventional resistive touch panel. Please refer to figure 1 , the resistive touch panel includes an upper board 110 and a lower board 120, ...

AI Technical Summary

Problems solved by technology

[0006] However, it can be known from the above operations that when the area A and the area B are simultaneously touched and subjected to pressure, the output voltages of the comparators AMP1_1, AMP2_4, AMP1_3, and AMP2_1 will all change.

Therefore, the controller of the touch panel may determine that the contact point is in area A and area B, but may also determine that the contact point is in area C and area D, so that the controller cannot correctly determine the position of the contact point

Therefore, due to the limitation of circuit design, the above-mentioned touch panel cannot realize the technology of multi-point detection.

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